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Javascript for validating numbers in textbox

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You can also make use of Filtered Text Box Extender. On key Press event, just call a function and pass event as parameter. Can you tell me how I can compare the value of 2 textboxes in c#? Textbox1 = 3, Textbox2 = 4 I want to throw an error message to say something to the effect that the value entered in Textbox2 has to be smaller than textbox1. Figure 1: Above figure is output of validation of empty field In above script, function Empty will check that the HTML input that is being send to the server has something in it.Ok, here’s a fairly basic one – how to force a textbox to accept only numeric input.Somebody asked me this today on a support call so I did a few quick lookups online and found the solutions listed rather unsatisfying.You can also call this function onkeyup javascript function.The function here just test for the digits and if the value is not a digit then it just replaces that value.Following script will compile the idea of validation for all letters.Listing 3: Validation for all letters Figure 3: Above output checks the entered data is letters or include any other char also. Two of them are using regular expression for matching and the other one is simple so not writing regex but if you want you can write a regex for this case also.

2)After decimal point,it should take only two should not take more than two digits. Email validation checks the following points Figure 2: Above two figures are example of valid and invalid emails.This is validation to check that entered values are all letters or combination of different chars.This tutorial shows both validation and accepting only numbers in a textbox.This example also shows inline Java Script function call with the input textbox. The javascript function checks for charcode when a key is pressed in the keyboard and it check if it does not fall between 48 and 57 then it is other than digit. We call the javascript function onkeypress javascript event.3)here you should raise on Keypress or on Keydown event for validating the textbox.